I use Safari and for the last couple of years I've used PithHelmet as my ad blocker. It's great, but it doesn't get updated often, and it's the only piece of software that requires me to hold back on Safari updates for more than a few days. I'm still unsure if it works fully with Safari 5.0.3, and the developer doesn't have an actively updated blog or Twitter page. What Safari ad blocker do you recommend, and why? Thanks!